Partitions with designated summands in which no parts are multiples of 3.

Terms

a(0) =1a(1) =1a(2) =3a(3) =4a(4) =9a(5) =12a(6) =21a(7) =29a(8) =48a(9) =64a(10) =99a(11) =132a(12) =195a(13) =257a(14) =366a(15) =480a(16) =666a(17) =864a(18) =1173a(19) =1511a(20) =2016a(21) =2576a(22) =3384a(23) =4296a(24) =5574a(25) =7027a(26) =9015a(27) =11296a(28) =14355a(29) =17880